CN205534510U - Automatic valve by depression bar unstability trigger action suitable for low pressure operating mode - Google Patents
Automatic valve by depression bar unstability trigger action suitable for low pressure operating mode Download PDFInfo
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- CN205534510U CN205534510U CN201620268378.4U CN201620268378U CN205534510U CN 205534510 U CN205534510 U CN 205534510U CN 201620268378 U CN201620268378 U CN 201620268378U CN 205534510 U CN205534510 U CN 205534510U
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- rocking arm
- valve
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- piston
- valve stem
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Abstract
The utility model relates to a be applicable to the automatic valve by long and thin depression bar unstability trigger action of low pressure operating mode, its essential element includes the low reaches pipeline, the rotary motion valve door, upper reaches pipeline, draw and press the pipe, a piston, a piston rod, the piston cylinder, the ejector pin, the ejector pin director, elongate rod, wand cap, the wand cap holder, the rocking arm, the rocking arm maincenter, end the position ware, the valve rod, the valve rod driven ware, the executor push rod, the executor spring, the executor fulcrum, wherein elongate rod is the core trigger member of this automatic valve, it has the stable and two kind crooked operating condition of unstability of straight line, and decide which kind of valve position whole automatic valve is in. Keep the straight line when stablizing the state as elongate rod, it is used in counter motive force and piston on the rocking arm through the ejector pin and is used in thrust on the rocking arm through the piston rod and keeps the rocking arm jointly at balanced state, and the rocking arm utilizes its special design's locking structure to block the valve rod driven ware, and the rotary motion valve door is at normal valve position, when elongate rod emergence unstability was crooked, its counter motive force to the rocking arm reduced in the twinkling of an eye, and piston and piston rod shake upper -arm circumference in pressure medium effect push -down and wind the rotation of rocking arm maincenter, release the constraining effect to the valve rod driven ware, and the valve rod driven ware is rotatory under executor spring and the effect of executor push rod, and then improper valve position is changed into with the rotary motion valve door by normal valve position to the drive valve rod.
Description
Technical field
The present invention relates to a kind of valve, more particularly relate to a kind of to automatically turn on or close under low pressure or ultralow pressure operating mode
Valve.
Background technology
In order to protect pressure pipeline, pressure vessel and the device of their upstream and downstream and equipment, it is often necessary to be arranged on superpressure operating mode
The valve that can automatically turn on or close down.In conventional practice, generally use pressure transmitter detection pressure pipeline or pressure
Pressure in force container, pressure transmitter outputs signal to control system, and when pressure exceedes setting value, control system can be automatically
Send instruction and make valve opening or closedown.
Pressure transmitter and control system is used jointly to realize the main potential risk of automatic open close valve under superpressure operating mode and be, as
Really pressure transmitter lost efficacy, or between pressure transmitter and control system signal transmission go wrong, or control system with
Signal transmission between valve goes wrong, it is possible to occur that pressure alreadys more than setting value, the situation of valve action the most as scheduled,
Device and equipment to pressure pipeline, pressure vessel and their upstream and downstream bring threat.
The present invention is mainly by valve stem actuators, angular travel valve, rocking arm, rocking arm maincenter, position-arresting device, piston, piston rod, top
Bar, push rod guider, elongate rod, pole cap, pole cap clamper and pressure guiding pipe composition.Wherein elongate rod is to control whole automatic valve
The core trigger parts that door is turned on and off, the design of this trigger unit is based on pressure bar stabilization and the principle of strut buckling.Elongate rod
Axis and pole cap, push rod, piston rod axis on same straight line.Piston bears from the pressure medium in upstream line,
This pressure loading is carried in elongate rod through piston rod, rocking arm and push rod.When the axial force loaded in elongate rod is less than
During the critical load of elongate rod, elongate rod is in straight line steady statue, and the axial propulsive thrust of elongate rod is transferred to push rod, and with Jie
Matter maintains rocking arm to be in poised state through the thrust that piston is applied on piston rod jointly, the valve stem actuators propulsive thrust warp to rocking arm
Cross rocking arm maincenter center, thus the rotary arm to rocking arm is zero, do not affect rocking arm balance.Now, rocking arm will not rotate,
Valve stem actuators is blocked by it by the locking structure of particular design, and angular travel valve is in normal valve position；When loading on elongate rod
On axial force when exceeding the critical load of elongate rod, the bending of elongate rod unstability and lose bearing capacity, elongate rod acts on
Axial propulsive thrust on push rod disappears, and pressure medium can promote piston and piston rod to move, and promotion has special locking structure
Rocking arm rotates around rocking arm maincenter, until rocking arm loses the effect of contraction to valve stem actuators.Now, valve stem actuators is performing
Rotate under device spring and executor's push rod effect, and then angular travel valve changed into improper valve position by normal valve position by band ovable valve stem,
It is achieved thereby that the automatically turning on or closing of superpressure operating mode lower valve.
In this application, core trigger parts elongate rod based on pressure bar stabilization and strut buckling principle design and piston, piston rod,
The parts synergism such as push rod, push rod guider, pole cap, pole cap clamper, rocking arm, rocking arm maincenter, it is achieved that pressure inverting
Device and the function of control system, whole system is transmitted without sensor and signal, designs simple, safe and reliable, the suitableeest
For the operating mode that the medium power such as low pressure or ultralow pressure is more weak.
Summary of the invention
By the automatic valve of strut buckling trigger action during the superpressure that the present invention relates to, it is mainly by valve stem actuators, rotary motion valve
Door, rocking arm (with the locking structure of particular design), rocking arm maincenter, position-arresting device, piston, piston rod, push rod, push rod guide
Device, pole cap, pole cap clamper, elongate rod and pressure guiding pipe composition.
Wherein, the function of pressure guiding pipe is the upstream line of angular travel valve to be connected with piston cylinder pressure chamber, makes piston bear
Pressure medium in angular travel valve upstream line.
Wherein, elongate rod is to control the core trigger parts that are turned on and off of whole automatic valve, the design of this trigger unit based on
Pressure bar stabilization and the principle of strut buckling, have straight line and stablize and unstability two duties of bending, and determine that automatic valve is in
Normal or improper valve position, its one end is connected with push rod, and the other end connects with the pole cap being installed in pole cap clamper.
Wherein, rocking arm has the locking structure of particular design, and it is in the rotation with rocking arm maincenter with the contact surface of valve stem actuators
The heart is the arc surface in the center of circle.Valve stem actuators can be by the center of rotation of rocking arm maincenter to the active force of rocking arm, so valve rod drives
It is zero to the rotary arm of rocking arm that device acts on the active force on rocking arm, and it will not cause the rotation of rocking arm.Even if when rocking arm active
When doing small rotary motion, valve stem actuators also will not produce any rotation.It addition, devise groove on rocking arm, and groove
Width is more than the position width being in contact with it on valve stem actuators, and after rocking arm rotates to an angle around rocking arm maincenter, valve rod drives
The position blocked by rocking arm on dynamic device can skid off from the groove of rocking arm, until the effect of contraction that rocking arm release is to valve stem actuators.
Now, valve stem actuators rotates under executor's push rod and executor's spring effect, and then band ovable valve stem changes angular travel valve
Valve position.
Wherein, the execution device being made up of executor's push rod, executor's spring and executor's fulcrum, its role is to work as rocking arm
The rotation of valve stem actuators is promoted when rotating to an angle around rocking arm maincenter and discharge the constraint to valve stem actuators.All it is
Valve stem actuators provides the mechanism of rotation torque, or the eccentric valve valve structure of angular travel valve is revolved by the active of medium active force
Turn and all can use in this patent, and be not limited in this patent push rod, spring and the shifting fork structure used as signal.
When in angular travel valve upstream line, pressure medium is pressed less than setting less than the pressure set in pressure, i.e. piston cylinder pressure chamber
During power, the axial load that elongate rod is born keeps depression bar straight line stable less than its critical load, and the axial propulsive thrust of elongate rod passes
Being handed to push rod, and jointly maintain rocking arm to be in poised state with pressure medium through the thrust that piston is delivered on piston rod, valve rod drives
Dynamic device is to the propulsive thrust of rocking arm through rocking arm maincenter center, and the rotary arm to rocking arm is zero, does not affect rocking arm balance.Now shake
Arm will not rotate, and valve stem actuators is blocked by it by the arc surface locking structure of particular design, and angular travel valve is just in
Often valve position.
When in angular travel valve upstream line, pressure medium is pressed higher than setting higher than the pressure set in pressure, i.e. piston cylinder pressure chamber
During power, the axial compression load that elongate rod is born will exceed its critical load, and generation strut buckling is lost bearing capacity by it.
Now, elongate rod acts on the propulsive thrust on push rod and can suddenly reduce, and pressure medium can promote piston and piston rod to move, and pushes away
Motion rocker arm rotates around rocking arm maincenter.After rocking arm rotates to an angle around rocking arm maincenter, valve stem actuators is blocked by rocking arm
Position from rocking arm, the groove of particular design can skid off, until rocking arm loses the effect of contraction to valve stem actuators.Now,
Valve stem actuators rotates under executor's spring and executor's push rod effect, so band ovable valve stem by angular travel valve by normal valve position
(if angular travel valve is in standard-sized sheet position under nominal situation, then under superpressure operating mode, angular travel valve should be automatic to change into improper valve position
Closing, valve position becomes fully closed position；If angular travel valve is in fully closed position under nominal situation, then under superpressure operating mode, angular travel valve should
Automatically turning on, valve position becomes standard-sized sheet position), it is achieved thereby that the automatically turning on or closing of valve during superpressure.
Accompanying drawing explanation
Fig. 1 be the present invention relates to be applicable to low pressure operating mode by the primary structure figure of the automatic valve of strut buckling trigger action；
Fig. 2 be the present invention relates to be applicable to low pressure operating mode by showing during the automatic valve normal condition of strut buckling trigger action
It is intended to；
Fig. 3 is schematic diagram when being triggered by the automatic valve of strut buckling trigger action being applicable to low pressure operating mode that the present invention relates to；
Fig. 4 is that the automatic valve by strut buckling trigger action being applicable to low pressure operating mode that the present invention relates to completes showing after triggering
It is intended to；
Fig. 5 is used rocker structure by the automatic valve by strut buckling trigger action being applicable to low pressure operating mode that the present invention relates to
Schematic diagram；
Detailed description of the invention
Be applicable to low pressure operating mode by the automatic valve of strut buckling trigger action, specifically its critical piece includes downstream line
1, angular travel valve 2, upstream line 3, pressure guiding pipe 4, piston 5, piston rod 6, piston cylinder 7, push rod 8, push rod guide
Device 9, elongate rod 10, pole cap 11, pole cap clamper 12, rocking arm 13, rocking arm maincenter 14, position-arresting device 15, valve rod 16, valve
Bar driver 17, executor's push rod 18, executor's spring 19 and executor's fulcrum 20.
Wherein elongate rod 10 be whole be applicable to low pressure operating mode by the core trigger portion of the automatic valve of strut buckling trigger action
Part, these core trigger parts are based on pressure bar stabilization and strut buckling principle design, have straight line and stablize and unstability two works of bending
Making state, corresponding decision automatic valve is in and is turned on and off valve position.Elongate rod 10 one end is connected with push rod 8, the other end and peace
The pole cap 11 being loaded in pole cap clamper 12 connects.When elongate rod 10 occurs unstability to bend, lose its straight line steady statue,
And and then Trigger Angle motion valve 2 changed into improper valve position by normal valve position.
The circulation of medium in wherein angular travel valve 2 controls upstream line 3 and downstream line 1.
Wherein the function of pressure guiding pipe 4 is the upstream line 3 of angular travel valve 2 to be connected with piston cylinder 7, makes piston 5 bear
Pressure medium in upstream line 3.
Wherein piston 5 is connected with rocking arm 13 by piston rod 6, when piston 5 is for linear motion under pressure medium effect, and can
To promote rocking arm 13 to rotate around rocking arm maincenter 14 by piston rod 6, the release effect of contraction to valve stem actuators 17, valve rod
Driver 17 rotates under executor's push rod 18 and executor's spring 19 act on, and then band ovable valve stem 16 and then change angle stroke
The valve position state of valve 2.
Wherein rocking arm 13 one end is fixed on rocking arm maincenter 14 so that it is can make within the specific limits around rocking arm maincenter 14 to rotate fortune
Dynamic.Rocking arm 13 upper surface contacts with push rod 8, and lower surface contacts with piston rod 6.Stablize when elongate rod 10 is in straight line
During state, the axial propulsive thrust that elongate rod 10 is transmitted by push rod 8, it is delivered to piston with medium in upstream line 3 through piston 5
Thrust on bar 6, common maintenance rocking arm 13 is in poised state, and the propulsive thrust of rocking arm 13 is led to by valve stem actuators 17 just
Crossing the center of rocking arm maincenter 14, the rotary arm to rocking arm 13 is zero, does not interferes with the balance of rocking arm 13.Now, rocking arm
13 will not rotate, and valve stem actuators 17 can be blocked by the arc surface locking structure of its particular design, even if rocking arm 13 is actively
Doing small rotary motion, valve stem actuators 17 also will not produce any rotation.Now, angular travel valve 2 is in normal valve position.
Said structure is as shown in Figure 1.
Wherein, the execution device being made up of executor's push rod 18, executor's spring 19 and executor's fulcrum 20, it acts on
In promoting valve stem actuators when rocking arm 13 rotates to an angle around rocking arm maincenter 14 and discharges the constraint to valve stem actuators 17
The rotation of 17.(all mechanisms that can be valve stem actuators and rotation torque is provided, or the eccentric valve valve structure of angular travel valve is subject to
Active rotation to medium active force all can use in this patent, and be not limited in this patent as signal use push rod,
Spring and shifting fork structure.)
Below using angular travel valve 2 as superpressure emergency decompression valve use time as a example by, be further described the specific embodiment party of the present invention
Formula.
In normal conditions, angular travel valve 2 is in fully closed position, and in upstream line 3, pressure medium is less than setting pressure, the most alive
Pressure in plug cylinder 7 pressure chamber is less than setting pressure, and the axial compression load that now elongate rod 10 is born is less than its critical load
Keeping straight line pressure bar stabilization, the axial propulsive thrust that elongate rod 10 is transmitted by push rod 8, with medium in upstream line 3 through piston 5
It is delivered to the thrust on piston rod 6, common maintains rocking arm 13 to be in poised state, and anti-to rocking arm 13 of valve stem actuators 17
Thrust is just by the center of rocking arm maincenter 14, and the rotary arm to rocking arm 13 is zero, does not interferes with the balance of rocking arm 13.This
Time, rocking arm 13 keeps balance without rotating, and valve stem actuators 17 can be blocked by the arc surface locking structure of its particular design
Living, even if rocking arm 13 actively does small rotary motion, valve stem actuators 17 also will not produce any rotation, angular travel valve 2
It is in normal valve position.As shown in Figure 2.
When in upstream line 3, pressure medium is higher than setting pressure higher than the pressure set in pressure, i.e. piston cylinder 7 pressure chamber,
The axial compression load that elongate rod 10 is born will exceed its critical load, and elongate rod 10 occurs unstability bending to lose bearing capacity,
It acts on the propulsive thrust on push rod 8 and can suddenly reduce, and pressure medium can promote piston 5 and piston rod 6 to move.In this process
In, piston rod 6 can promote rocking arm 13 to rotate around rocking arm maincenter 14.When rocking arm 13 rotates certain angle around rocking arm maincenter 14
After degree, because the position width that contacts with rocking arm 13 on valve stem actuators 17 is less than the groove width of design on rocking arm 13, it will be from
Rocking arm 13 skids off, as shown in Figure 3.Until rocking arm 13 loses the constraint to valve stem actuators 17, valve stem actuators 17 exists
Rotate under executor's push rod 18 and executor's spring 19 effect, and then angular travel valve 2 is opened by band ovable valve stem 16, thus on
Medium in play pipe road 3 downstream pipeline 1 is released, as shown in Figure 4.
Rocking arm 13 have employed special locking structure design, and it is with the rotation of rocking arm maincenter 14 with the contact surface of valve stem actuators 17
Turn the arc surface that center is the center of circle, as shown in Figure 5.The active force of rocking arm 13 can be passed through rocking arm maincenter 14 by valve stem actuators 17
Center of rotation.So it is 0 to the rotary arm of rocking arm 13 that valve stem actuators 17 acts on the power on rocking arm 13, it will not draw
Playing the rotation of rocking arm 13, even if when rocking arm 13 actively does small rotary motion, valve stem actuators 17 also will not produce any turn
Dynamic, as shown in Figure 2.It addition, devise groove on rocking arm 13, as it is shown in figure 5, and groove width is more than valve stem actuators
The position width being in contact with it on 17.After rocking arm 13 rotates to an angle around rocking arm maincenter 14, on valve stem actuators 17
The position blocked by rocking arm 13 can skid off from the groove of rocking arm 13, thus rocking arm 13 discharges the constraint to valve stem actuators 17
Effect, as shown in Figure 3.
It addition, according to the Euler law of strut buckling, can be changed it by the elastic modelling quantity of adjustment elongate rod 10 and slenderness ratio
Critical load, and then setting pressure during change angular travel valve 2 action.
When the angular travel valve 2 of the present invention is designed as being automatically switched off under superpressure operating mode, it is only necessary to by valve rod 16 90-degree rotation i.e.
Can.Detailed description of the invention is designed as during superpressure emergency relief valve identical with angular travel valve 2, does not repeats them here.
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive special type
And/or outside step, all can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), unless specifically stated otherwise,
All can be by other equivalence or there is the alternative features of similar purpose replaced.I.e., unless specifically stated otherwise, each feature is simply
An example in a series of equivalences or similar characteristics.
The invention is not limited in aforesaid detailed description of the invention.The present invention expands to any new feature disclosed in this manual
Or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (6)
1. be applicable to low pressure operating mode by an automatic valve for strut buckling trigger action, its critical piece include downstream line (1),
Angular travel valve (2), upstream line (3), pressure guiding pipe (4), piston (5), piston rod (6), piston cylinder (7), push rod
(8), in push rod guider (9), elongate rod (10), pole cap (11), pole cap clamper (12), rocking arm (13), rocking arm
Pivot (14), position-arresting device (15), valve rod (16), valve stem actuators (17), executor's push rod (18), executor's spring (19),
Executor's fulcrum (20), this automatic valve is characterised by: elongate rod (10) is to determine the core of whole automatic valve whether action
Heart trigger unit, when elongate rod (10) keeps straight line steady statue, angular travel valve (2) is in normal valve position；When elongated
When bar (10) occurs unstability bending, Trigger Angle motion valve (2) is changed into improper valve position by normal valve position.
The most according to claim 1 be applicable to low pressure operating mode by the automatic valve of strut buckling trigger action, wherein elongate rod
(10) one end connects with push rod (8), and the other end connects with the pole cap (11) being installed in pole cap clamper (12), and carefully
The axis of stock (10), pole cap (11), push rod (8) and piston rod (6) is on same straight line.
The most according to claim 1 be applicable to low pressure operating mode by the automatic valve of strut buckling trigger action, wherein pressure guiding pipe (4)
The pressure chamber of upstream line (3) with piston cylinder (7) is connected, makes piston (5) bear in upstream line (3)
Pressure medium.
The most according to claim 1 be applicable to low pressure operating mode by the automatic valve of strut buckling trigger action, wherein rocking arm (13)
One end is fixed on rocking arm maincenter (14), it is possible to rotate within the specific limits around rocking arm maincenter (14)；Rocking arm (13)
Upper surface contacts with push rod (8), and lower surface contacts with piston rod (6)；Piston rod (6) and push rod (8) act on
During thrust imbalance on rocking arm (13), rocking arm (13) can be promoted to rotate around rocking arm maincenter (14)；Rocking arm (13) with
The contact surface of valve stem actuators (17) is the arc surface with the center of rotation of rocking arm maincenter 14 as the center of circle；The upper design of rocking arm (13)
Groove width more than the corresponding position width on the valve stem actuators (17) that is in contact with it, when rocking arm (13) is around rocking arm maincenter
(14), when rotating to an angle, the upper position contacted with rocking arm (13) of valve stem actuators (17) can be from the ditch of rocking arm (13)
Skidding off in groove, until the effect of contraction that rocking arm (13) release is to valve stem actuators (17), valve stem actuators (17) is performing
Device push rod (18) and the lower rotation of executor's spring (19) effect, and then band ovable valve stem (16) change angular travel valve (2)
Valve position state.
The most according to claim 1 be applicable to low pressure operating mode by the automatic valve of strut buckling trigger action, wherein work as elongate rod
(10), when being in straight line pressure bar stabilization state, the axial propulsive thrust of elongate rod (10) is transferred to push rod (8), and with medium pressure
Power maintains rocking arm (13) to be in poised state, valve stem actuators through the thrust that piston (5) is delivered on piston rod (6) jointly
(17) to center of rotation through rocking arm maincenter (14) of the propulsive thrust of rocking arm (13), its rotary arm to rocking arm (13)
Being zero, do not affect rocking arm (13) balance, now rocking arm (13) will not rotate, and valve stem actuators (17) is blocked by it,
Angular travel valve (2) is in normal valve position；After elongate rod (10) occurs unstability bending to lose bearing capacity, elongate rod (10)
The propulsive thrust acted on push rod (8) can reduce suddenly, and pressure medium can promote piston (5) and piston rod (6) mobile, and
Rocking arm (13) is promoted to rotate around rocking arm maincenter (14)；When rocking arm (13) rotates to an angle around rocking arm maincenter (14)
After, the upper position contacted with rocking arm (13) of valve stem actuators (17) can skid off from the groove of rocking arm (13), until rocking arm
(13) effect of contraction to valve stem actuators (17) is lost；Valve stem actuators (17) is at executor's push rod (18) and performs
Device spring (19) effect is lower to rotate, and angular travel valve (2) is changed into improper valve position by normal valve position by band ovable valve stem (16).
The most according to claim 1 be applicable to low pressure operating mode by the automatic valve of strut buckling trigger action, elongate rod therein
(10) its critical load can be changed by adjusting its elastic modelling quantity and slenderness ratio, and then setting during change valve auto-action
Pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620268378.4U CN205534510U (en) | 2016-03-30 | 2016-03-30 | Automatic valve by depression bar unstability trigger action suitable for low pressure operating mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620268378.4U CN205534510U (en) | 2016-03-30 | 2016-03-30 | Automatic valve by depression bar unstability trigger action suitable for low pressure operating mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205534510U true CN205534510U (en) | 2016-08-31 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620268378.4U Expired - Fee Related CN205534510U (en) | 2016-03-30 | 2016-03-30 | Automatic valve by depression bar unstability trigger action suitable for low pressure operating mode |
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| Country | Link |
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| CN (1) | CN205534510U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594365A (en) * | 2016-03-30 | 2017-04-26 | 江苏瑞朗博机械设备有限公司 | Automatic valve applicable to low pressure working conditions and triggered to act through pressure bar destabilizing |
| CN106704676A (en) * | 2017-02-08 | 2017-05-24 | 江苏神通阀门股份有限公司 | Valve driving device |
| CN110131455A (en) * | 2019-05-08 | 2019-08-16 | 河北科技大学 | A kind of protection valve when decompression defective valve |
| GB2576086A (en) * | 2018-08-03 | 2020-02-05 | Jiangsu Reliable Mech Equipment Co Ltd | Valve system with isolation device |
-
2016
- 2016-03-30 CN CN201620268378.4U patent/CN205534510U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594365A (en) * | 2016-03-30 | 2017-04-26 | 江苏瑞朗博机械设备有限公司 | Automatic valve applicable to low pressure working conditions and triggered to act through pressure bar destabilizing |
| CN106594365B (en) * | 2016-03-30 | 2017-12-15 | 江苏瑞朗博机械设备有限公司 | Suitable for the automatic valve by strut buckling trigger action of low pressure operating mode |
| CN106704676A (en) * | 2017-02-08 | 2017-05-24 | 江苏神通阀门股份有限公司 | Valve driving device |
| GB2576086A (en) * | 2018-08-03 | 2020-02-05 | Jiangsu Reliable Mech Equipment Co Ltd | Valve system with isolation device |
| GB2576086B (en) * | 2018-08-03 | 2020-12-16 | Jiangsu Reliable Mech Equipment Co Ltd | Valve system with isolation device |
| CN110131455A (en) * | 2019-05-08 | 2019-08-16 | 河北科技大学 | A kind of protection valve when decompression defective valve |
| CN110131455B (en) * | 2019-05-08 | 2023-12-19 | 河北科技大学 | Protective valve for failure of pressure reducing valve |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20180330 |